XanMod-ing Ubuntu To Perform Closer To Intel's Clear Linux
The GEGL imaging library that powers GIMP and other photo applications is much faster on Clear Linux than the stock or modified Ubuntu setup.
The modifications to Ubuntu did help the GIMP performance some, but Clear Linux's GIMP packaging appears to still have more optimizations.
Clear Linux's PHP binary is extensively optimized with PGO and more to help it perform much faster than other distributions.